Phone numbers in Chatham, New York
Chatham has 4 phone prefixes in area code 518.
Biggest holders: Taconic Tel, Fidium Enterprise Services, Charter / Spectrum. This is the local calling area (rate center) where those prefixes were first assigned.
- Internet / business phone carrier 25%
- Phone company 75%
Every prefix in Chatham
Search the first six digits of a number in this list. If it's here, the number started in Chatham with the carrier shown. If it isn't, check the New York page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 518-392 | Taconic Tel | Phone company | – |
| 518-397 | Taconic Tel | Phone company | – |
| 518-440 | Fidium Enterprise Services | Phone company | 2012 |
| 518-938 | Charter / Spectrum | Internet / business phone carrier | 2007 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.